| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 13 |
2.7%
|
| 2 | Every few weeks | 31 |
6.4%
|
| 3 | Every few months | 130 |
26.7%
|
| 4 | Not at all | 313 |
64.3%
|
| Sysmiss | 18 |